1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/storage/schema/delta/54/delete_forward_extremities.sql b/synapse/storage/schema/delta/54/delete_forward_extremities.sql
index aa40f13da7..b062ec840c 100644
--- a/synapse/storage/schema/delta/54/delete_forward_extremities.sql
+++ b/synapse/storage/schema/delta/54/delete_forward_extremities.sql
@@ -20,3 +20,4 @@ INSERT INTO background_updates (update_name, progress_json) VALUES
DROP TABLE IF EXISTS _extremities_to_check; -- To make this delta schema file idempotent.
CREATE TABLE _extremities_to_check AS SELECT event_id FROM event_forward_extremities;
+CREATE INDEX _extremities_to_check_id ON _extremities_to_check(event_id);
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